CN103929032B - Electric rotating machine - Google Patents
Electric rotating machine Download PDFInfo
- Publication number
- CN103929032B CN103929032B CN201310683786.7A CN201310683786A CN103929032B CN 103929032 B CN103929032 B CN 103929032B CN 201310683786 A CN201310683786 A CN 201310683786A CN 103929032 B CN103929032 B CN 103929032B
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- Prior art keywords
- rotor
- permanent magnet
- flux
- radial outside
- core
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/005—Machines with only rotors, e.g. counter-rotating rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A kind of electric rotating machine, the rotor of this electric rotating machine has: at the first rotor iron core and second rotor core of axial overlap；Nonmagnetic material layer between rotor core；And imbed the multiple permanent magnet portions in each rotor core.Each rotor core has alternately arranged multiple flux shield portions and multiple useful flux portions at its outer peripheral face.Both parts in the part in the flux shield portion of the second rotor core and the useful flux portion of the second rotor core and the flux shield portion of the first rotor iron core are at axial overlap.As a result of which it is, the different useful flux portion of the magnetic pole of the radial outside of adjacent rotor core is each other the most overlapping.Further, it is possible to by the suppression of nonmagnetic material layer from the flux shield portion of a rotor core to the useful flux portion leakage magnetic flux of another rotor core.Thereby, it is possible to suppress magnetic flux short circuit between adjacent rotor core.As a result of which it is, the useful flux of rotor core can be suppressed to decline and the torque drop of electric rotating machine.
Description
Technical field
The present invention relates to a kind of electric rotating machine.
Background technology
Conventionally, there is known a kind of, there is the permanent magnetic baried type electric rotating machine that embedment has the rotor core of permanent magnet.
Further, in the past as cogging torque and the method for torque ripple of reduction electric rotating machine, by rotor or the magnetic pole of stator
Configure relative to axially inclined.That is, commonly known so-called deflection structures.
Such as record in Japanese Laid Open Patent JP-A2000-308287 and a kind of conventional there is deflection structures
Permanent magnetic baried type electric rotating machine.Motor described in JP-A2000-308287 makes to be embedded with permanent magnet
Multiple rotor core blocks stagger in the direction of rotation of rotor, and be integrally formed in the axial direction (claim 1,
0014 section).
Patent documentation 1: Japanese Laid Open Patent JP-A2000-308287
In motor described in JP-A2000-308287, in two axially adjacent rotor core blocks, bury
Enter the N pole in the rotor core block of upside and the S pole in the rotor core block on the downside of embedment on rotation axis direction
Overlapping (Fig. 1,0015 section).Therefore, cause coming from the S pole on the downside of the magnetic flux entrance of the N pole of upside.Thus lead
Cause magnetic flux not interlink with the stator of rotor exterior, and form short-circuited conducting sleeve at internal rotor.Thus cause torque drop (0009
Section).That is, the useful flux causing rotor reduces.In the motor of this publication, in order to suppress to flow from the N pole of upside
To the magnetic flux of the S pole of downside, between rotor core block, sandwich laminal nonmagnetic material (0015 section).But,
If as the motor of this publication, N pole and the S pole of downside of upside are overlapping on rotation axis direction, be difficult to into
One step suppression useful flux declines.
Summary of the invention
It is an object of the invention to provide a kind of following technology: i.e., there is rotor core permanent of deflection structures
The useful flux suppressing rotor core in Magnet baried type electric rotating machine declines.
The electric rotating machine of the first invention illustrated in the application has the rotor rotated centered by central axis.The application
The first illustrated invention has the rotor of substantial cylindrical.Described rotor has the first rotor iron core and the second rotor ferrum
Core, described second rotor core and described the first rotor iron core are at axial overlap.Described rotor has: multiple permanent magnetic
Ferrum portion, in the plurality of permanent magnet portion is embedded in described the first rotor iron core and in described second rotor core；
And nonmagnetic material layer, it is between described the first rotor iron core and described second rotor core.Respectively described
One rotor core and described second rotor core, be circumferentially configured with the plurality of permanent magnet with roughly equal interval
Portion.The magnetic pole of the radial outer side in two circumferentially adjacent described permanent magnet portions is different.Described the first rotor
Iron core and described second rotor core have segmentation deflection structures, and described segmentation deflection structures refers to, described the first rotor
The plurality of permanent magnet portion of iron core and the plurality of permanent magnet portion of described second rotor core were arranged in along week
To the position staggered.Described the first rotor iron core and described second rotor core are respectively provided with multiple flux shield portion with many
Individual useful flux portion.The magnetic saturation between the magnetic pole in circumferentially adjacent described permanent magnet portion of multiple flux shield portions.
Multiple useful flux portions are positioned at the radial outside in described permanent magnet portion, for outside described permanent magnet portion and described rotor
Magnetic circuit between portion.The plurality of flux shield portion and the plurality of useful flux portion at described the first rotor iron core and
The circumferentially alternating configuration of respective outer peripheral face of described second rotor core.The described flux shield of described second rotor core
Both parts in the part in portion and the described useful flux portion of described second rotor core with described first turn
The described flux shield portion of sub-iron core is at axial overlap.
According to the first invention illustrated in the application, at axially adjacent the first rotor iron core and the second rotor core
In, the part in the part in the flux shield portion of the first rotor iron core and the flux shield portion of the second rotor core is at axle
To overlap.Thus, the useful flux portion that the useful flux portion of the first rotor iron core is different from the magnetic pole of the second rotor core
The most overlapping.As a result of which it is, magnetic flux short circuit can be suppressed between axially adjacent rotor core.That is, energy
The useful flux enough suppressing rotor core declines.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of the rotor involved by the first embodiment.
Fig. 2 is the longitudinal section of the electric rotating machine involved by the second embodiment.
Fig. 3 is the axonometric chart of the rotor involved by the second embodiment.
Fig. 4 is the top view of the rotor unit involved by the second embodiment.
Fig. 5 is the partial top view of the rotor unit involved by the second embodiment.
Fig. 6 is the partial top view of the rotor involved by the second embodiment.
Fig. 7 is the axonometric chart of the rotor involved by variation.
Fig. 8 is the axonometric chart of the rotor involved by variation.
Fig. 9 is the top view of the rotor unit involved by variation.
Figure 10 is the top view of the rotor unit involved by variation.
Figure 11 is the axonometric chart of the rotor involved by variation.
Symbol description
1 electric rotating machine；
2 stationary part；
3 rotating parts；
9,9A central axis；
21 casing；
22 caps；
23 stators；
31 axles；
32,32A, 32B, 32C, 32F rotor；
50,50A, 50C nonmagnetic material layer；
50B void layer；
51,51B, 51C, 51D, 51E, 51F the first rotor unit；
52,52B, 52C, 52E, 52F second rotor unit；
53C third trochanter unit；
61,61A, 61E permanent magnet；
62,62A, 62B, 62C, 62E flux shield portion；
63,63A, 63B, 63D, 63E, 63F useful flux portion；
71 axis holes；
72 magnet openings；
73 non magnetic holes；
81F first component；
82F second component；
320,320A, 320F permanent magnet portion；
510,510A the first rotor iron core；
520,520A the second rotor core；
611,611A, 612,612A permanent magnet；
621 central parts；
622 circumference connecting portions；
623 end wall；
631, magnetic flux portion, 631A N pole；
632, magnetic flux portion, 632A S pole.
Detailed description of the invention
Hereinafter, referring to the drawings the embodiment illustrated in the present invention is illustrated.It addition, in this application, respectively
Direction with the centerline axis parallel of electric rotating machine is referred to as " axially ", by orthogonal for the central axis with electric rotating machine
Direction is referred to as " radially ", and the direction along the circular arc centered by the central axis of electric rotating machine is referred to as " circumferential ".And
And, in this application, with axially as above-below direction, and relative to casing with cap side be on shape to each several part
Shape and position relationship illustrate.But, the definition of this above-below direction does not limit electric rotating machine involved in the present invention
Direction in use.
Further, " parallel direction " in the application also includes direction that be substantially parallel.Further, in the application " just
The direction handed over " also include the direction that is substantially orthogonal.
<1. the first embodiment>
Fig. 1 is the axonometric chart of the rotor 32A of the electric rotating machine involved by the first embodiment.As it is shown in figure 1, turn
Sub-32A is substantial cylindrical, and rotates centered by central axis 9A.Rotor 32A has the first rotor iron core
510A, the second rotor core 520A, nonmagnetic material layer 50A and multiple permanent magnet portion 320A.
The first rotor iron core 510A and the second rotor core 520A is at axial overlap.Nonmagnetic material layer 50A is positioned at
Between one rotor core 510A and the second rotor core 520A.
Each permanent magnet portion 320A is constituted the single magnetic pole being radially oriented outside.In the present embodiment, Duo Geyong
Magnet part 320A is made up of the permanent magnet 61A for single parts respectively for a long time.That is, multiple permanent magnet 61A divides
Gou Cheng a permanent magnet portion 320A.
In multiple permanent magnet 61A are embedded in the first rotor iron core 510A and in the second rotor core 520A.
Respectively circumferentially with the configuration of roughly equal interval in the first rotor iron core 510A and in the second rotor core 520A
There is multiple permanent magnet 61A.
Further, multiple permanent magnet 61A include multiple permanent magnet 611A that the surface of radial outside is N pole and
The surface of radial outside is multiple permanent magnet 612A of S pole.Permanent magnet 611A and permanent magnet 612A is along week
To alternately arranged.That is, the surface of the radial outside of circumferentially adjacent permanent magnet 611A and permanent magnet 612A
Magnetic pole different.
According to said structure, the first rotor iron core 510A and the second rotor core 520A, there is multiple flux shield
Portion 62A and multiple useful flux portion 63A.Flux shield portion 62A and useful flux portion 63A is at the first rotor iron core
510A and the second rotor core 520A circumferentially alternating configuration of respective outer peripheral face.
Multiple flux shield portion 62A are respectively at the magnetic of circumferentially adjacent permanent magnet 611A Yu permanent magnet 612A
Magnetic saturation between pole.
Multiple useful flux portion 63A lay respectively at the radial outside of each permanent magnet 61A.Useful flux portion 63A is
Magnetic circuit between the permanent magnet 61A and the outside of rotor 32A of its radially inner side.Thus, multiple effective magnetic
Logical portion 63A has N pole magnetic flux portion 631A and magnetic flux portion, S pole 632A.The radial outside of magnetic flux portion, N pole 631A
Surface be N pole.The surface of the radial outside of magnetic flux portion, S pole 632A is S pole.Magnetic on the surface of radial outside
The radial outside of the permanent magnet 611A of extremely N pole is configured with magnetic flux portion, N pole 631A.Further, at radial outside
The radial outside of the permanent magnet 612A that magnetic pole is S pole on surface be configured with magnetic flux portion, S pole 632A.Therefore,
Multiple N pole magnetic flux portion 631A and the circumferentially alternating configuration of 632A of magnetic flux portion, multiple S pole.That is, multiple N pole magnetic flux
Portion 631A and multiple S pole magnetic flux portion 632A is circumferentially adjacent two useful fluxs across flux shield portion 62A
The magnetic pole of the radial outside of portion 63A is different.
The permanent magnet 61A configuration of the permanent magnet 61A and the second rotor core 520A of the first rotor iron core 510A
In the position circumferentially offset one from another.Thus, as it is shown in figure 1, the flux shield portion 62A of the first rotor iron core 510A
It is arranged in the position circumferentially staggered with the flux shield portion 62A of the second rotor core 520A.Similarly, first turn
The useful flux portion 63A of the useful flux portion 63A and the second rotor core 520A of sub-iron core 510A was arranged in along week
To the position staggered.That is, rotor 32A has so-called segmentation deflection structures.Thereby, it is possible to reduction electric rotating machine
Cogging torque and torque ripple.
It addition, the first rotor iron core 510A based on this segmentation deflection structures and the week of the second rotor core 520A
To stagger for, the magnetic pole of the useful flux portion 63A and the second rotor core 520A of the first rotor iron core 510A is not
Same useful flux portion 63A staggering in axial nonoverlapping degree.
In this segmentation deflection structures, the flux shield portion 62A of the first rotor iron core 510A and the second rotor core
A part of the useful flux portion 63A of 520A is at axial overlap.Similarly, the magnetic flux of the second rotor core 520A
A part of the useful flux portion 63A of shielding part 62A and the first rotor iron core 510A is at axial overlap.
On the other hand, as it was previously stated, have non-between the first rotor iron core 510A and the second rotor core 520A
Magnetic layer 50A.Thereby, it is possible at the flux shield portion 62A of the first rotor iron core 510A and the second rotor core
Magnetic flux short circuit is suppressed between the useful flux portion 63A of 520A.Similarly, it is possible to the first rotor iron core 510A's
Magnetic flux short circuit is suppressed between the flux shield portion 62A of useful flux portion 63A and the second rotor core 520A.That is,
The useful flux that can suppress rotor 32A declines.
Further, a part of the flux shield portion 62A of the first rotor iron core 510A is with the second rotor core 520A's
A part of flux shield portion 62A is at axial overlap.Thus, magnetic flux portion, the N pole 631A of the first rotor iron core 510A
With magnetic flux portion, the S pole 632A of the second rotor core 520A the most overlapping.Similarly, the first rotor iron core 510A
S pole magnetic flux portion 632A and magnetic flux portion, the N pole 631A of the second rotor core 520A axially the most overlapping.That is,
Between adjacent rotor core, the different useful flux portion 63A of the magnetic pole of radial outside is each other the most overlapping.
As a result of which it is, magnetic flux short circuit between adjacent rotor core can be suppressed further.I.e., it is possible to suppression turns further
The useful flux of sub-32A declines.
<2. the second embodiment>
<overall structure of 2-1. electric rotating machine>
Then, second embodiment of the present invention is illustrated.
Fig. 2 is the longitudinal section of the electric rotating machine 1 involved by the second embodiment.The electric rotating machine 1 of present embodiment
It is equipped on automobile.The electric rotating machine 1 of present embodiment is for producing the driving force of transfer.But, the present invention's
Electric rotating machine 1 can be used for the device beyond automobile.
As in figure 2 it is shown, electric rotating machine 1 has stationary part 2 and rotating part 3.Rotating part 3 is supported to can be relative
Rotate in stationary part 2.
The stationary part 2 of present embodiment has casing 21, cap 22, stator 23, bearing portions 24 and upper shaft
Bearing portion 25.
Casing 21 has the bottom 212 of the bottom of substantially cylindric sidewall 211 and closed side wall.Cap 22 covers
The opening on the top of casing 21.Stator 23 and rotor described later 32 are contained in and are surrounded by casing 21 and cap 22
Inner space in.Central authorities in the bottom 212 of casing 21 are configured with bearing portions 24.Further, at cap 22
Central authorities be configured with upper bearing portion 25.
Stator 23 corresponds to drive electric current and produce the armature of magnetic flux.Stator 23 has stator core 41, insulation
Part 42 and coil 43.Stator core 41 is such as by the stacked steel plate shape at axially stacked multiple electromagnetic steel plates
Become.Stator core 41 has circular core-back 411 and prominent to radially inner side from core-back 411
Multiple teeth 412.Core-back 411 is fixed on the inner peripheral surface of the sidewall 211 of casing 21.Multiple teeth 412 are circumferentially
It is spaced with roughly equal.
Insulating part 42 is by the resin formation for insulator.The two ends of upper surface, lower surface and the circumference of each tooth 412
Face is covered by insulating part 42.Coil 43 is made up of the wire of the surrounding being wound on insulating part 42.Insulating part 42 is positioned at
Between tooth 412 and coil 43.Thus, prevent tooth 412 and coil 43 from electrical short occurring.Alternatively, it is also possible at tooth
The surface of 412 is implemented insulation coating and is replaced insulating part 42.
Bearing portions 24 is arranged between the axle described later 31 of casing 21 and rotating part 3 side, and upper bearing portion 25 configures
Between cap 22 is with the axle described later 31 of rotating part 3 side.Thus, be supported to can be relative to casing for axle 31
21 and cap 22 rotate.Bearing portions 24 and the upper bearing portion 25 of present embodiment make outer ring and inner ring
Across the ball bearing that spheroid rotates against.But, bearing portions 24 and the upper bearing portion 25 of present embodiment also may be used
To use the bearing of other modes such as sliding bearing or FDB to replace ball bearing.
The rotating part 3 of present embodiment has axle 31 and rotor 32.
Axle 31 is the parts of the column extended along central axis 9.Axle 31 is by bearing portions 24 and upper bearing portion 25
Supporting, and rotate centered by central axis 9.Further, as in figure 2 it is shown, the upper end of axle 31 is from cap 22
Highlight upward.The upper end of axle 31 is such as connected with the transfer of automobile via Poewr transmission mechanisms such as gears.
Further, the upper end of axle 31 can also be connected with the drive division beyond transfer.
It addition, in the present embodiment, axle 31 highlights upward from cap 22.But, the present invention is not limited to this.
Axle 31 can also highlight downwards from the bottom 212 of casing 21, and its bottom is connected with drive division.
Rotor 32 is arranged in the radially inner side of stator 23.Rotor 32 rotates together with axle 31.For rotor 32
Detailed construction describes later.
In this electric rotating machine 1, drive electric current, then at stator core 41 when providing to the coil 43 of stationary part 2
Multiple teeth 412 produce magnetic flux radially.And, produced by the flux interaction between tooth 412 and rotor 32
The torque of circumference.As a result of which it is, rotating part 3 rotates centered by central axis 9 relative to stationary part 2.Work as rotation
When portion 3 rotates, to the transfer transmission driving force being connected with axle 31.
<structure of 2-2. rotor>
Then, the detailed construction of rotor 32 is illustrated.Fig. 3 is the axonometric chart of rotor 32.Fig. 4 is first turn
The top view of subelement 51.Fig. 5 is the partial top view of the first rotor unit 51.Fig. 6 is the local of rotor 32
Top view.
As it is shown on figure 3, rotor 32 is in substantial cylindrical.Rotor 32 has the first rotor unit the 51, second rotor
Unit 52 and nonmagnetic material layer 50.The first rotor unit 51 and the second rotor unit 52 are at axial overlap.And,
Between the first rotor unit 51 and the second rotor unit 52, there is nonmagnetic material layer 50.
As shown in Figure 4, the first rotor unit 51 has the first rotor iron core 510 and multiple permanent magnet portion 320.
The first rotor iron core 510 is the parts of the tubular surrounding axle 31.The first rotor iron core 510 of present embodiment
It is made up of the stacked steel plate at axially stacked electromagnetic steel plate.The first rotor iron core 510 be provided with axis hole 71,
Multiple magnet openings 72 and multiple non magnetic hole 73, described axis hole 71, multiple magnet opening 72 and multiple non magnetic
Hole 73 the most through the first rotor iron core 510.
Each permanent magnet portion 320 is constituted the single magnetic pole being radially oriented outside.In the present embodiment, multiple forever
Magnet part 320 is made up of the permanent magnet 61 for single parts respectively.That is, multiple permanent magnet 61 respectively constitutes one
Individual permanent magnet portion 320.
As shown in Figure 4, axis hole 71 is arranged on the central authorities of the first rotor iron core 510, and axle 31 is inserted in this axis hole
In 71.
Multiple magnet openings 72 are circumferentially spaced with roughly equal.In multiple magnet openings 72, embedment has multiple respectively
A permanent magnet 61 in permanent magnet 61.That is, in a magnet opening 72, a permanent magnet portion it is formed with
320.Here, multiple permanent magnets 61 include the permanent magnet that magnetic pole is N pole 611 He on the surface of radial outside
The magnetic pole on the surface of radial outside is the permanent magnet 612 of S pole.The magnetic pole on the surface of radial outside is the permanent of N pole
The magnetic pole on the surface of Magnet 611 and radial outside is the circumferentially alternating configuration of permanent magnet 612 of S pole.Therefore, edge
Circumferentially-adjacent permanent magnet 611 is different with the magnetic pole on the surface of the radial outside of permanent magnet 612.
As it is shown in figure 5, be respectively arranged with non magnetic hole in the position adjacent with the both sides of the circumference of each magnet opening 72
73.Non magnetic hole 73 with in the side of the circumference of each permanent magnet 61 at least from radial outside end to substantially
Part till centre is adjacent.Thus, non magnetic hole 73 suppresses the two ends leakage magnetic flux of the circumference from permanent magnet 61.
In the present embodiment, non magnetic hole 73 is respectively space, but can also be inserted with resin in non magnetic hole 73
Deng non-magnetic part.
Further, in the first rotor iron core 510, connected than magnet opening 72 and non magnetic by radially connected portion 74
Hole 73 is leaned on the part of radial outside and leans on the part of radially inner side, described footpath than magnet opening 72 and non magnetic hole 73
It is located along between circumferentially-adjacent two magnet opening 72 to connecting portion 74.Radially connected portion 74 is by outside connecting portion 741
Constituting with inner side connecting portion 742, described outside connecting portion 741 is located along between circumferentially-adjacent non magnetic hole 73,
Between described inner side connecting portion 742 is near the radial inner end of the peripheral side of adjacent permanent magnet 61.
The radial outside end of connecting portion 741, outside is connected with the central part described later 621 in flux shield portion 62.Outward
Two sides of the circumference of side connecting portion 741 are adjacent with non magnetic hole 73.Further, the circumference of outside connecting portion 741
Width constant.
The radial outside end of connecting portion 742, inner side is connected with the radially inner side end of outside connecting portion 741.Inner side connects
Two sides of the circumference meeting portion 742 are adjacent with two sides of the circumference of adjacent two permanent magnets 61.Inner side
The radially inner side of the side of the radially inner side end of the both ends of the surface of the circumference of connecting portion 742 and the circumference of permanent magnet 61
End is adjacent.Further, the radial outside end of both ends of the surface of the circumference of inner side connecting portion 742 and non magnetic hole 73 phase
Adjacent.
According to said structure, the first rotor iron core 510 has multiple flux shield portion 62 and multiple useful flux portion 63.
Multiple flux shield portions 62 and multiple useful flux portions 63 join the outer peripheral face of the first rotor iron core 510 is circumferentially alternating
Put.Each flux shield portion 62 is magnetically saturated part between the magnetic pole of circumferentially adjacent permanent magnet 61.At this
In the first rotor iron core 510 of embodiment, composition the first rotor iron core will be geomagnetic into when electric rotating machine 1 is static
The part of more than the 70% of the raw-material saturated magnetization of 510 is as flux shield portion 62.
Each useful flux portion 63 is to become permanent magnet 61 and between the stator 23 of the radial outside of rotor 32
The part of a part for magnetic circuit.The magnetic flux produced between permanent magnet 61 and stator 23 is in useful flux portion 63
Circulation.
Multiple useful flux portions 63 include magnetic flux portion, pole of magnetic flux portion, N pole 631 and S 632.Magnetic flux portion, N pole 631
The surface of radial outside is N pole.The surface of the radial outside in magnetic flux portion, S pole 632 is S pole.Table at radial outside
The magnetic pole in face is that the radial outside of the permanent magnet 611 of N pole is configured with magnetic flux portion, N pole 631.Further, radially
The radial outside of the permanent magnet that magnetic pole is S pole 612 on the surface in outside is configured with magnetic flux portion, S pole 632.That is, many
Magnetic flux portion, individual N pole 631 and the circumferentially alternating configuration in magnetic flux portion 632 of multiple S pole.
The first rotor unit 51 and the second rotor unit 52 have same structure.With the first rotor unit 51
Identical, the second rotor unit 52 has the second rotor core 520 and multiple permanent magnet 61.For the second rotor list
The detailed content of each several part of unit 52, due to identical with the first rotor unit 51, therefore omits repeat specification.
As it was previously stated, nonmagnetic material layer 50 is between the first rotor unit 51 and the second rotor unit 52.Non-magnetic
Gonosome layer 50 is the parts of the tabular radially expanded around axle 31.Nonmagnetic material layer 50 is such as by resinous wood
Material is made.But, as long as nonmagnetic material layer 50 is nonmagnetic material, then can also be by the non magnetic gold such as copper or rustless steel
Belong to material to make.
The permanent magnet 61 of the first rotor unit 51 and the permanent magnet 61 of the second rotor unit 52 are arranged in circumferentially
The position offset one from another.Thus, as it is shown on figure 3, the flux shield portion 62 of the first rotor unit 51 and the second rotor
The flux shield portion 62 of unit 52 is arranged in the position circumferentially staggered.Similarly, the first rotor unit 51 has
The useful flux portion 63 of effect magnetic flux portion 63 and the second rotor unit 52 is arranged in the position circumferentially staggered.That is, turn
Son 32 has so-called segmentation deflection (step skew) structure.Thus, the first rotor unit 51 and the second rotor
The change of the magnetic flux distribution of the respective outer peripheral face of unit 52 offsets.Thus, the magnetic flux of the outer peripheral face of rotor 32 entirety divides
The change of cloth is smoothened.As a result of which it is, cogging torque and the torque ripple of electric rotating machine 1 can be reduced.
Further, owing to the first rotor unit 51 circumferentially staggers with the second rotor unit 52, therefore such as Fig. 3 and figure
Shown in 6, the flux shield portion 62 of the first rotor unit 51 and the one of the useful flux portion 63 of the second rotor unit 52
Part is at axial overlap.Similarly, the flux shield portion 62 of the second rotor unit 52 and the first rotor unit 51
The part in useful flux portion 63 is at axial overlap.
On the other hand, as it was previously stated, there is nonmagnetic material between the first rotor unit 51 and the second rotor unit 52
Layer 50.Thereby, it is possible at the flux shield portion 62 of the first rotor unit 51 and effective magnetic of the second rotor unit 52
Between logical portion 63 and at the useful flux portion 63 of the first rotor unit 51 and the flux shield of the second rotor unit 52
Magnetic flux short circuit is suppressed between portion 62.I.e., it is possible to the useful flux of suppression rotor 32 declines.
Further, as shown in Fig. 3 and Fig. 6, in this electric rotating machine 1, the flux shield of the first rotor unit 51
The part in portion 62 is configured at the position at axial overlap with the part in the flux shield portion 62 of the second rotor unit 52
Put.
Therefore, the magnetic flux portion, N pole 631 of the first rotor unit 51 and the magnetic flux portion, S pole 632 of the second rotor unit 52
The most overlapping.Similarly, the magnetic flux portion, S the pole 632 and N of the second rotor unit 52 of the first rotor unit 51
Magnetic flux portion, pole 631 is the most overlapping.As a result of which it is, can be at the first rotor unit 51 and the second rotor unit
Suppression magnetic flux short circuit further between 52.I.e., it is possible to the useful flux of suppression rotor 32 declines further.Thus,
The torque drop of electric rotating machine 1 can be suppressed.
<2-3. flux shield portion and the shape in useful flux portion>
Then, the shape in flux shield portion 62 and useful flux portion 63 is carried out bright.
As it is shown in figure 5, flux shield portion 62 is between magnetic flux portion, pole of magnetic flux portion, N pole 631 and S 632.N pole
Magnetic flux portion 631 is positioned at the radial outside of the permanent magnet that magnetic pole is N pole 611 on the surface of radial outside.S pole magnetic flux
Portion 632 is positioned at the radial outside of the permanent magnet that magnetic pole is S pole 612 on the surface of radial outside.Further, magnetic flux screen
Cover portion 62 and there is central part 621, circumference connecting portion 622 and end wall 623.Central part 621 is arranged in magnetic flux screen
Cover the substantial middle of the circumference in portion 62.The end of the radially inner side of central part 621 and the radial direction of outside connecting portion 741
The end in outside is connected.Circumference connecting portion 622 is arranged in the both sides of the circumference in flux shield portion 62, and connects central authorities
Portion 621 and end wall 623.The end face of the radially inner side of circumference connecting portion 622 is adjacent with non magnetic hole 73.
In the present embodiment, central part 621 and circumference connecting portion 622 radial outside surface shape with
The cross section that central axis 9 is orthogonal is straight line or the circular arc centered by central axis 9.
End wall 623 is arranged in the two ends of the circumference in flux shield portion 62.In the present embodiment, end wall 623
Respectively with the part on the surface of the radial outside of permanent magnet 61 radially superposed.Further, the footpath of end wall 623
Surface laterally is almost parallel with the surface of the radial outside of permanent magnet 61.It addition, the radial direction of permanent magnet 61
Radial width between the surface of the surface in outside and the radial outside in useful flux portion 63 is than the radial direction of permanent magnet 61
Radial width between the surface of the surface in outside and the radial outside of end wall 623 is big.
Here, the surface of the radial outside in the surface of the radial outside of so-called permanent magnet 61 and useful flux portion 63
Between radial width refer to, at the radial outside in surface and useful flux portion 63 of the radial outside of permanent magnet 61
Surface between, the radial width of the position that radial width is maximum.Further, the radial direction of so-called permanent magnet 61
Radial width between the surface of the surface in outside and the radial outside of end wall 623 refers to, at permanent magnet 61
Between the surface of the surface of radial outside and the radial outside of end wall 623, the radial direction of the position that radial width is maximum
Width.
Thus, the easy magnetic saturation of end wall 623.That is, the magnetic flux density of end wall 623 is than useful flux portion 63
Magnetic flux density is big.Therefore, at the both ends of the circumference in useful flux portion 63, magnetic circuit is difficult to tend to flux shield portion 62,
But easily tend to radially.
Further, flux shield portion 62 is magnetically saturated between permanent magnet 611 and permanent magnet 612.That is, magnetic
Logical shielding part 62 in the magnetic pole strength of the radial outside of permanent magnet 611 with an end wall 623 radially superposed
Part with in the magnetic pole strength of the radial outside of permanent magnet 612 with another end wall 623 in radially superposed part
Between be magnetically saturated.
Here, non magnetic hole 73 is positioned at the radially inner side of circumference connecting portion 622.The radial outside in non magnetic hole 73
Radial width constant between the surface of the radial outside of surface and circumference connecting portion 622.It addition, non magnetic hole
The same permanent magnetic of radial width between the surface of the surface of the radial outside of 73 and the radial outside of circumference connecting portion 622
Radial width between the surface of the radial outside of ferrum 61 with the surface of the radial outside of end wall 623 is roughly the same.
I.e., it is possible to suppress the magnetic circuit between permanent magnet 611 and permanent magnet 612 radially to expand by non magnetic hole 73
Exhibition.Thereby, it is possible to the magnetic flux density of suppression central part 621 and circumference connecting portion 622 becomes than end wall 623
Magnetic flux density little.
Further, in the present embodiment, the circumferential width on the surface of the radial outside of each permanent magnet 61 than each effectively
The circumferential width in magnetic flux portion 63 is big.Thus, the circumferential width with the surface of the radial outside of each permanent magnet 61 is less than
The situation of the circumferential width in each useful flux portion 63 is compared, it is possible to increase the torque of electric rotating machine 1 further.That is,
By utilizing each permanent magnet 61 to make end wall 623 magnetic saturation, thus improve and flow to be respectively arranged with from each permanent magnet 61
The efficiency of the magnetic flux in effect magnetic flux portion 63.Further, by utilizing each permanent magnet 61 to make end wall 623 magnetic saturation, energy
Enough rotation efficiency improving electric rotating machine 1 further.
Further, in the present embodiment, the footpath in the surface ratio flux shield portion 62 of the radial outside in useful flux portion 63
Surface laterally is prominent to radial outside.Thus, outside the first rotor iron core 510 and the second rotor core 520
Surface circumference magnetic flux density compared with square wave closer to sine wave.That is, the sensing produced in electric rotating machine 1
The waveform of voltage is close to sinusoidal wave form.Further, in the present embodiment, the table of the radial outside in useful flux portion 63
The shape in face is circular arc in the cross section orthogonal with central axis 9, and this circular arc is to lean on radial outside than central axis 9
Centered by Dian.Thus, electric rotating machine 1 waveform of the induced voltage produced is closer to sinusoidal wave form.
And, as shown in Figure 4, from end on observation, the shape that the first rotor iron core 510 is symmetrical in line.Further, with
This in the same manner, from end on observation, the shape that the second rotor core 520 is also symmetrical in line.Therefore, each useful flux portion
The circumferential center of center and each permanent magnet 61 of the circumference of 63 is radially superposed.Thus, no matter rotor 32 to
Which direction rotates, and can obtain the induced voltage with same waveform.
3. variation
Above, the embodiment illustrated in the present invention is illustrated, but the present invention is not limited to above-mentioned embodiment.
Fig. 7 is the axonometric chart of the rotor 32B involved by a variation.In the example of fig. 7, axially adjacent
The first rotor unit 51B and the second rotor unit 52B between there is void layer 50B.And, this void layer 50B
Constitute nonmagnetic material layer.Such as by holding ring between the first rotor unit 51B and the second rotor unit 52B
The nonmagnetic material ring of shape and void layer 50B is set.In the example of fig. 7, it is also possible at the first rotor unit 51B
Flux shield portion 62B with the second rotor unit 52B with this flux shield portion 62B at effective magnetic of axial overlap
Magnetic flux short circuit is suppressed between logical portion 63B.Similarly, it is possible at the useful flux portion 63B of the first rotor unit 51B
With the second rotor unit 52B's and this useful flux portion 63B suppress between the flux shield portion 62B of axial overlap
Magnetic flux short circuit.
Fig. 8 is the axonometric chart of the rotor 32C involved by other variation.In the example of fig. 8, rotor 32C tool
There are the first rotor unit 51C, the second rotor unit 52C, third trochanter unit 53C and two nonmagnetic material layers
50C.The first rotor unit 51C and the second rotor unit 52C clips nonmagnetic material layer 50C and axially adjacent.
Second rotor unit 52C and third trochanter unit 53C clips nonmagnetic material layer 50C and axially adjacent.That is, two
Individual nonmagnetic material layer 50C lays respectively between the first rotor unit 51C and the second rotor unit 52C and second turn
Between subelement 52C and third trochanter unit 53C.
In the example of fig. 8, a part of the flux shield portion 62C of the first rotor unit 51C and the second rotor list
A part of the flux shield portion 62C of unit 52C is at axial overlap.Further, the magnetic flux screen of the second rotor unit 52C
Cover the part of a portion 62C part with the flux shield portion 62C of third trochanter unit 53C at axial overlap.That is,
In two axially adjacent rotor units, a part of the flux shield portion 62C of a rotor unit and another
A part of the flux shield portion 62C of individual rotor unit is at axial overlap.Therefore, in the example of fig. 8, also can
Enough suppression magnetic flux short circuits between adjacent rotor unit.I.e., it is possible to effective magnetic of suppression rotor unit 51C-53C
Catharsis drops.As shown in the example of figure 8, as long as rotor unit is two or more, both can be three, it is also possible to
It it is more than four.
Fig. 9 is the top view of the first rotor unit 51D involved by other variation.In the above-described embodiment,
From end on observation, rotor core is that line is symmetrical, and in the example of figure 9, from end on observation, the first rotor unit
51D is not symmetrical in line.Specifically, the surface of the radial outside of useful flux portion 63D has the one of deflection circumference
The shape of side.In the example of figure 9, in the case of the direction of rotation of rotor is only a direction, even if from axially
Observing not symmetrical in line, but as long as being rotationally symmetrical from end on observation, being just obtained in that the induced voltage of stable waveform.
Figure 10 is the top view of the first rotor unit 51E involved by other variation.In the example of Figure 10, forever
For a long time the surface of the radial outside of Magnet 61E all with useful flux portion 63E radially superposed.Therefore, permanent magnet 61E
Surface and the flux shield portion 62E of radial outside the most overlapping.In the example of Figure 10, as long as first turn
A part of the flux shield portion 62E of subelement 51E and the one of the flux shield portion 62E of the second rotor unit 52E
Part at axial overlap, then also is able between adjacent rotor core suppress magnetic flux short circuit.I.e., it is possible to suppression rotor
The useful flux of iron core declines.
Figure 11 is the axonometric chart of the rotor 32F involved by other variation.In the rotor of above-mentioned embodiment, many
Individual permanent-magnetic part is not made up of the permanent magnet for single parts, but the invention is not restricted to this.With single effectively
Single permanent magnet portion corresponding to magnetic flux portion can also be made up of the permanent magnet for two or more parts respectively.Such as,
In the example of Figure 11, respectively in the first rotor unit 51F and the second rotor unit 52F, with single effectively
Single permanent magnet portion 320F corresponding for magnetic flux portion 63F is made up of first component 81F and second component 82F respectively.
Constitute the magnetic pole on the surface that first component 81F and second component 82F are radial outside of each permanent magnet portion 320F
Identical permanent magnet.In the example of Figure 11, first component 81F is configured to footpath outside with second component 82F
The V-shaped of side extension.Thus, permanent magnet portion 320F is formed with the single magnetic pole being radially oriented outside.
Further, in the above-described embodiment, nonmagnetic material layer is the parts of tabular.But, the present invention is not limited to this.
Can also be integrally formed by the molding injecting molten resin to the mould inserting plural rotor core, come same
Fixing and the formation of nonmagnetic material layer of Shi Jinhang rotor core.
And, additionally it is possible to constituted electromotor being equal to the structure of the electric rotating machine of above-mentioned embodiment and variation.
The electric rotating machine of the present invention can also be the electromotor being used in automobile, electrically assisted bicycle, wind-power electricity generation etc..
Further, the shape of the detail section of each parts can also be different from the shape each shown in the drawings of the application.Further,
The each key element occurred in above-mentioned embodiment and variation can also be fitted in the range of not conflicting
When combination.
[industrial applicability]
The present invention can be used in electric rotating machine.
Claims (9)
1. an electric rotating machine, it has:
The rotor of the substantial cylindrical rotated centered by central axis,
Described rotor has:
The first rotor iron core；
Second rotor core, itself and described the first rotor iron core are at axial overlap；
Nonmagnetic material layer, it is between described the first rotor iron core and described second rotor core；And
Multiple permanent magnet portions, the plurality of permanent magnet portion is embedded in described the first rotor iron core and described the
In two rotor cores,
Respectively at described the first rotor iron core and described second rotor core, circumferentially it is configured with roughly equal interval
The plurality of permanent magnet portion,
The magnetic pole of the radial outer side in two circumferentially adjacent described permanent magnet portions is different,
Described the first rotor iron core and described second rotor core have segmentation deflection structures, so-called segmentation deflection structures
Refer to, the plurality of permanent magnet portion of described the first rotor iron core and described second rotor core the plurality of forever
Magnet part is arranged in the position circumferentially staggered,
Described the first rotor iron core and described second rotor core are respectively provided with:
Multiple flux shield portions, the plurality of flux shield portion magnetic pole in circumferentially adjacent described permanent magnet portion it
Between magnetic saturation；And
Multiple useful flux portions, the plurality of useful flux portion is positioned at the radial outside in described permanent magnet portion, for described
Magnetic circuit between the outside of permanent magnet portion and described rotor,
The plurality of flux shield portion and the plurality of useful flux portion are at described the first rotor iron core and described second
The circumferentially alternating configuration of the respective outer peripheral face of rotor core,
Have described in the part in the described flux shield portion of described second rotor core and described second rotor core
The described flux shield portion of effect both parts in magnetic flux portion and described the first rotor iron core at axial overlap,
Described flux shield portion has end wall, described end wall and circumferentially adjacent two described permanent magnet portions
It is a part of radially superposed,
Between the surface of the surface of the radial outside in described permanent magnet portion and the radial outside in described useful flux portion
Between the radial width surface than the surface of the radial outside in described permanent magnet portion and the radial outside of described end wall
Radial width big,
The surface of the radial outside of described end wall is almost parallel with the surface of the radial outside in described permanent magnet portion.
Electric rotating machine the most according to claim 1,
The plurality of permanent-magnetic part is not made up of single parts.
Electric rotating machine the most according to claim 1,
The plurality of permanent-magnetic part is not made up of multiple parts.
4. according to the electric rotating machine described in any one in claims 1 to 3,
Described flux shield portion is geomagnetic into more than the 70% of the raw-material saturated magnetization constituting rotor core.
Electric rotating machine the most according to claim 1,
Described nonmagnetic material layer is formed from a resin.
Electric rotating machine the most according to claim 1,
Between the surface of the surface of the radial outside in described permanent magnet portion and the radial outside in described useful flux portion
Radial width refers to, the radial outside in the surface of the radial outside in described permanent magnet portion and described useful flux portion
Between surface, the radial width of the position that radial width is maximum,
Radial direction between the surface of the surface of the radial outside in described permanent magnet portion and the radial outside of described end wall
Width refers to, the surface of the surface of the radial outside in described permanent magnet portion and the radial outside of described end wall it
Between, the radial width of the position that radial width is maximum.
Electric rotating machine the most according to claim 1,
Described electric rotating machine also has the armature of the radial outside being arranged in described rotor,
The surface of the radial outside in flux shield portion described in the surface ratio of the radial outside in described useful flux portion is to radially
Protruding outside.
Electric rotating machine the most according to claim 7,
In the cross section orthogonal with described central axis, being shaped as of the surface of the radial outside in described useful flux portion is round
Arc, this circular arc is centered by the point leaning on radial outside than described central axis.
Electric rotating machine the most according to claim 1,
The circumferential center in center and the described permanent magnet portion of the circumference in described useful flux portion is radially superposed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013004276A JP6128419B2 (en) | 2013-01-15 | 2013-01-15 | Rotating electric machine |
| JP2013-004276 | 2013-01-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103929032A CN103929032A (en) | 2014-07-16 |
| CN103929032B true CN103929032B (en) | 2016-09-21 |
Family
ID=51147145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310683786.7A Active CN103929032B (en) | 2013-01-15 | 2013-12-13 | Electric rotating machine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9966809B2 (en) |
| JP (1) | JP6128419B2 (en) |
| CN (1) | CN103929032B (en) |
| BR (1) | BR112015016838A2 (en) |
| DE (1) | DE112013006430T5 (en) |
| WO (1) | WO2014112021A1 (en) |
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- 2013-12-25 WO PCT/JP2013/007566 patent/WO2014112021A1/en active Application Filing
- 2013-12-25 US US14/646,476 patent/US9966809B2/en active Active
- 2013-12-25 BR BR112015016838A patent/BR112015016838A2/en not_active Application Discontinuation
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Also Published As
| Publication number | Publication date |
|---|---|
| US9966809B2 (en) | 2018-05-08 |
| JP6128419B2 (en) | 2017-05-17 |
| WO2014112021A1 (en) | 2014-07-24 |
| JP2014138433A (en) | 2014-07-28 |
| US20160020653A1 (en) | 2016-01-21 |
| BR112015016838A2 (en) | 2017-07-11 |
| DE112013006430T5 (en) | 2015-10-15 |
| CN103929032A (en) | 2014-07-16 |
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